President Obama speaks in North Carolina (12 images)

U.S. President Barack Obama enters the room before giving a speech about building fuel efficient vehicles at the Daimler Trucks North America Freightliner plant in Mount Holly, North Carolina on March 7, 2012. UPI/Nell Redmond .

U.S. President Barack Obama jokes about his tie as he speaks to autoworkers at the Daimler Trucks North America Freightliner plant in Mount Holly, North Carolina on March 7, 2012. UPI/Nell Redmond .

U.S. President Barack Obama speaks to autoworkers at the Daimler Trucks North America Freightliner plant in Mount Holly, North Carolina on March 7, 2012. UPI/Nell Redmond .

U.S. President Barack Obama gives a energy speech as he speaks to autoworkers at the Daimler Trucks North America Freightliner plant in Mount Holly, North Carolina on March 7, 2012. UPI/Nell Redmond .